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IV. Match a line in a with a line in b.

А

В

1. Copper was discovered long ago.

a. Yes, it is.

2. Is copper used in automobile industry?

b. Where exactly?

3. Bronze was first produced in Asia and Africa.

c. You are welcome.

4. Why is copper so widely, used today?

d. You are quite right.

5. Electric wiring is made of pure copper, isn't it?

e. Because of its valuable properties.

6. Thank you very much.

f. Certainly.

Language Practice

I. Learn how to read these words.

ductile

recycling

reliable

plumbing

decorative

II. Match the Ukrainian words with their English equivalents.

1. оцінювати

a. qualities

2. добувати

b. conductor

3. провідник

c. purpose

4. домашній

d. to extract

5. вязкий (еластичний)

e. ductile

6. нержавіючий

f. domestic

7. якості

g. to estimate

8. ціль

h. corrosion resistant

III. Match the words with the opposite meaning.

А

В

1. useful

a. varied

2. ability

b. decorate

3. functional

c. tremendous

4. magnetic

d. to recover

5. present

e. useless

6. small

f. inability

7. necessary

g. ancient

8. uniform

h. nonmagnetic

IV. Say what these people could do in the past.

EXAMPLE: I can't use the new apparatus now but I could use it yesterday at the lesson.

1. He can't do research on copper alloys this term but he … it last term.

2. We can't compare the properties of these substances now but we … them during our previous experiment.

3. They can't study aluminium bronze at the lesson now but they … it in the lab yesterday.

4. We can't extract copper with the help of stone and bone tools but ancient people … it in this way thousands of years ago.

5. I can't describe the results of his experiment today but he … it yesterday.

V. Use the following statements in the past and future.

EXAMPLE: He can drive well.

He could drive well 10 years ago.

He will be able to drive well in a month.

1. He can continue his studies at the Mechanical Engineering facul­ty.

2. Our engineers can extract copper in several ways.

3. I can visit the Bingham Canyon copper mine.

4. This new car can move without a driver.

5. The scientists can use the samples of this substance in the test.

VI. Ask your scientific supervisor to explain what can happen to these engineering materials.

EXAMPLE: copper / to be alloyed with iron

A: Can copper be alloyed with iron?

B: Certainly it can. Copper can be alloyed with iron.

or I'm afraid it can't. Copper can't be alloyed with iron.

a ductile metal / to be worked into a new shape

copper / to be used as a conductor of electricity

tin / to be alloyed with copper

brass / to be used in bearings and gears

copper / to be recycled several times

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